C# : .NET

[".0s4*0|collections;datetime-format;collections",["F@eA","KALABEECBEBEICJC","OBOOSTUUUUTTUUUUYHDGDGHGDGDGDFOBOCBOBOBCCWCSTTUUUUTTUUUU","wsskr.",".NET","Array","Dictionary","List","String","2D","Async","Console","DataTable","Dates","DateTime","Enum","File","For","Foreach","Format","IEnumerable","If","IndexOf","Lambda","LINQ","Optimization","Parse","Path","Process","Property","Random","Regex","Replace","Sort","Split","Static","Substring","Switch","Tuple","While","Private Constructor."," A private constructor cannot be externally called. It is used to ensure higher-quality code bases on complex projects. A private constructor forces the class to provide a controlled and unified access pattern. ","Private ","private","Example."," Inside the private constructor, a field is initialized to a constant number. The private constructor ensures that it is impossible for the class to be instantiated directly from external classes.","It provides"," more compile-time checking for the validity of your program. This improves the long-term validity of the code base\u2014without impairing performance or clarity. This program uses a singleton design pattern. ","ins","class","adsbygoogle","data-ad-client","ca-pub-4712093147740724","data-ad-slot","6227126509","data-ad-format","auto","br","ins","class","adsbygoogle","data-ad-client","ca-pub-4712093147740724","data-ad-slot","6227126509","data-ad-format","auto","C# program that uses private constructor","\n\nusing System;\n\npublic sealed class ","Test","\n{\n public static readonly Test Instance = new Test();"," // Singleton pattern\n ","public int A;"," // Instance field\n ","private Test()"," // This is the private constructor\n ","{\n this.A = 5;\n }\n}\n\nclass Program\n{\n static void Main()\n {","\n // We can access an instance of this object that was created.\n // ... The private constructor was used.\n ","Test test = Test.Instance;","\n // These statements show that the class is usable.\n ","Console.WriteLine(test.A);\n test.A++;\n Console.WriteLine(test.A);\n }\n}\n\n","Output","\n\n5\n6","The Test class has"," a private constructor and two fields. And the Program class introduces the Main entry point. The private constructor initializes the public int field A to be equal to 5 at the start of the program's execution. ","Class ","class","Restricting access to object creation."," A private constructor is similar to a public constructor in that it uses the type name followed by a formal parameter list. The formal parameter list in this private constructor shown is empty. ","Note: ","The private constructor simply makes it impossible for external code to instantiate the class freely without using reflection.","Reflection ","reflection","This can enforce"," the singleton design concept. The private constructor is a way of writing code that enforces your intent for the class. This essentially allows the compiler to police the project. ","Compile-Time Error ","compile-time-error","Singleton."," Let's consider the singleton design pattern. This is an easily-understood, widely-adopted design pattern. In the C# language, you can use a private constructor to ensure that external code never incorrectly creates a singleton instance. ","Singleton ","singleton","Note: ","A private constructor restricts access to the constructor. It ensures the object can only be created by a member in the type.","Therefore: ","The private constructor is a desirable part of the singleton pattern implementation in the C# language.","Summary."," We looked at a private constructor in a singleton design pattern. The private accessibility modifier enables greater control over the project-wide usage of your class, without impairing any other aspects of the class. ","And: ","When using a private constructor, patterns such as the factory pattern or the singleton pattern can return instances.","br","ins","class","adsbygoogle","data-ad-client","ca-pub-4712093147740724","data-ad-slot","3679700504","data-ad-format","link","br","ins","class","adsbygoogle","data-ad-client","ca-pub-4712093147740724","data-ad-slot","6227126509","data-ad-format","auto"],"url(data:image/png;base64,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)","url(data:image/png;base64,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)","url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG4AAACCAgMAAADasxWRAAAADFBMVEX/6Nn///+VlZX29va5ksB5AAAASElEQVR4AWPACZj/f0DmjkqOSjKtQgcLyJccZiEE9SOmP8mXHEaBMBoIo4EwGggryJccvvVKKAogTnJUclRyVHLklgmjkqOSAALWyrsxEHLDAAAAAElFTkSuQmCC)"]

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